package com.strongbj.iot.devices.ru.message;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

import com.google.common.base.Preconditions;
import com.strongbj.core.util.ByteUtil;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelHandlerContext;
import io.netty.util.concurrent.Future;
import io.netty.util.concurrent.GenericFutureListener;

/**
 * RU1000消息工厂
 * @author yuzhantao
 *
 */
public class RuMessageFactory {
	private final static Logger logger = LogManager.getLogger(RuMessageFactory.class);
	private final static int[] crc_Table1={
			0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
			0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
			0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
			0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
			0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
			0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
			0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
			0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
			0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
			0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
			0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
			0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
			0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
			0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
			0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
			0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
			0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
			0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
			0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
			0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
			0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
			0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
			0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
			0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
			0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
			0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
			0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
			0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
			0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
			0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
			0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
			0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
			};
	/**
	 * 创建消息
	 * @param deviceCode
	 * @param type
	 * @param datas
	 * @return
	 */
	public static byte[] createMessage(byte[] deviceCode,byte type,byte[] datas) {
		Preconditions.checkArgument(deviceCode.length==3);
		short dataLen = (short)(datas!=null?datas.length:0);
		
		byte[] ret = new byte[12+dataLen];
		ret[0]=0x5A;
		ret[1]=(byte) 0xA5;
		System.arraycopy(deviceCode, 0, ret, 2, 3);
		ret[5]=type;
		System.arraycopy(ByteUtil.shortToByteArr(dataLen), 0, ret, 6, 2);
		ret[8]=0x01;
		ret[9]=0x01;
		System.arraycopy(datas, 0, ret, 10, datas.length);
		short crc = calcCrc(ret,ret.length-2);
		System.arraycopy(ByteUtil.shortToByteArr(crc), 0, ret, ret.length-2, 2);
		return ret;
	}
	
	private static short calcCrc(byte[] aSrc, int alen)
	{
		short d = 0;
        byte tda;
        int n = 0;
        while (alen-- != 0)
        {
            tda = (byte)((d & 0xffff) >> 8);
            d <<= 8;
            d ^= crc_Table1[(tda ^ aSrc[n]) & 0xFF];
            n += 1;
        }
        return d;
	}
	
	/**
	 * 发送盘点命令到RU1000
	 * 
	 * @param ctx
	 * @param devCode
	 */
	@SuppressWarnings({ "rawtypes", "unchecked" })
	public static void sendReinventoryCommandToRU1000(ChannelHandlerContext ctx, String devCode) {
		byte[] reinventoryCommand = RuMessageFactory.createMessage(ByteUtil.hexStringToBytes(devCode), (byte) 0x01,
				new byte[] { 0x01 });
		ByteBuf bs = Unpooled.copiedBuffer(reinventoryCommand);
		ChannelFuture future = ctx.channel().writeAndFlush(bs);
		future.addListener(new GenericFutureListener() {
			private final String SEND_COMMAND = ByteUtil.byteArrToHexString(reinventoryCommand, true);

			@Override
			public void operationComplete(Future future) throws Exception {
				if (future.isSuccess()) {
					logger.info("发送盘点请求命令成功,DevCode:{}  发送命令:{}", devCode, SEND_COMMAND);
				} else {
					logger.info("发送盘点请求命令失败,DevCode:{}  发送命令:{}", devCode, SEND_COMMAND);
				}
			}

		});
	}
}
